How to free space on /var directory for logging issues with a Citrix ADC appliance

April 14, 2023

Contributed by:

S C A

The following article explains how an administrator can free the space from the/vardirectory of a Citrix ADC appliance. You can follow the steps when the Citrix GUI is not accessible.

When the amount of disk space is low in the/vardirectory of the appliance, you might not be able to sign in to the Citrix GUI. In this scenario, you can remove the old log files to create free space in the/vardirectory.

Points to remember

Ensure that you back up the files before removing the files from the appliance.

To free space in the/vardirectory of a Citrix ADC appliance, complete the following procedure:

Log on to the CLI of Citrix ADC by using SSH. For more information to complete this task, see the Citrix ADC documentation.
After you log on to Citrix ADC CLI, switch to the shell prompt using the following command.shell
Run the following command to see the availability of space on the Citrix ADC appliance.df -h

If the memory capacity of the/vardirectory is filled up to 90 percent, then you must delete few files from this directory.

Run the following commands to view the contents of the /var directory:cd /varls -l

The directories that are usually of interest are as follows:

                /var/nstrace——这个目录包含跟踪文件.This is the most common reason for HDD being filled on the Citrix ADC. This is due to an nstrace being left running for indefinite amount of time. All traces that are not of interest can and should be deleted. To stop an nstrace, go back to the CLI and issue stop nstrace command. /var/log - This directory contains system specific log files. /var/nslog - This directory contains Citrix ADC log files. /var/tmp/support - This directory contains technical support files, also known as, support bundles. All files not of interest should be deleted. /var/core - Core dumps are stored in this directory. There will be directories within this directory and they will be labeled with numbers starting with 1. These files can be quite large in size. Clear all files unless the core dumps are recent and investigation is required. /var/crash - Crash files, such as process crashes are stored in this directory. Clear all files unless the crashes are recent and investigation is required. /var/nsinstall - Firmware is placed in this directory when upgrading. Clear all files, except the firmware that is currently being used.
               

Verify if any of the directories are using more space:

                  du -hs * 44k cache 2.0k clusterd 2.0k configdb 6.0k core 989M crash 4.0k cron 2.0k dev 6.0k download 2.0k gui 2.0k install 2.0k krb 2.0k learnt_data 122M log 366M netscaler 14k ns_gui 86k ns_sys_backup 631M nsinstall 883M nslog 32k nsproflog 2.0k nssynclog 16k nstemplates 36k nstmp 4.5G nstrace 8.1M opt 6.0k pubkey 52k run 28M safenet 72M tmp 2.0k vmtools 14k vpn
                 

Delete the files which are not required:
```
rm -r nstrace/*
```
For more help on deleting files see FreeBSD man Pages.
- 如果日志或nslogdirectory is using more space, then run the following commands to open the log directory and view its contents:
- Delete the files which are not required.rm -r nstrace/*For more help on deleting files see FreeBSD man Pages.
- 如果日志或nslogdirectory is using more space, then run the following commands to open the log directory and view its contents:
```
cd /var/log ls -l cd /var/nslog ls -l
```

Ensure that all files are compressed. This is indicated by the .tar.gz file name extension.
If you are using Citrix ADM, then verify the/var/ns_system_backupdirectory. Ensure that Citrix ADM clears the backup files it creates.

More resources

For information on any of the commands mentioned in the preceding procedure, see -http://ss64.com/bash/

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How to free space on /var directory for logging issues with a Citrix ADC appliance

April 14, 2023

Contributed by:

S C A

April 14, 2023

Contributed by:

S C A

How to free space on /var directory for logging issues with a Citrix ADC appliance

Points to remember

More resources

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